Corrected complexity for build_stats method.

app.py

@@ -14,12 +14,17 @@ class Stats:
         a linear amount of time, in the data length.
         """
         _data = {}
+        # loop is linear in the data.
         for v in data:
+            # Dictionary access should be constant time.
             _data[v] = _data.get(v, 0) + 1
 
         _list, prev = [], 0
+        # Adding a constant 1001 steps.
         for i in range(0, 1002):
+            # Constant time step
             new = _data.get(i, 0) + prev
+            # constant time step
             _list.append(new)
             prev = new
         self._list = _list
@@ -72,7 +77,8 @@ class DataCapture:
         which I think it's a good assumption to start
         with.
         """
-        return Stats(sorted(self._values))
+        # The sorted where turns this in to O(n*log(n))
+        return Stats(self._values)
 
 
 if __name__ == "__main__":